“Conceptual and Object Models” Please respond to the following:
- Provide one example of an entity object, association object, agent object, and an event object. Determine which one of these object types closely resembles or mirrors a conceptual object model. Provide a rationale.
- From the e-Activity, examine the key features of a class diagram. Predict whether you would be able to examine a class diagram and point out entities, associations, attributes, and operations. Determine how you would be able to tell them apart.
Provide one example of an entity object, association object, agent object, and an event object. Determine which one of these object types closely resembles or mirrors a conceptual object model. Provide a rationale.
Entity objects- are classes that encapsulate the business model, including rules, data, relationships, and persistence behavior, for items that are used in your business application. For example, entity objects can represent. the logical structure of the business, such as product lines, departments, sales, and regions.
Association Object – a relationship between classes of objects that allows one object instance to cause another to perform an action on its behalf.
Agent Object- where an entity is either an agent, an event, an action, a claim, a commitment, or an ordinary object, and where special relationships between agents and events, actions, claims and commitments supplement the fundamental association, aggregation/composition and generalization relationship types of Entity-Relationship (ER) and Unified Modeling Language (UML) class modeling.
Event Object- event object contains a number of properties that describe the event that occurred.
Determine which one of these object types closely resembles or mirrors a conceptual object model. Provide a rationale. However, the object type thats closely resembles or mirrors a conceptual object model will be entity object because according to Lamsweerde (2009), conceptual object is an instance of an object in the problem domain of a system and has a distinguishable name and value and that means entity object has rlues and regulations on how conceptual objects operates with entity object.
From the e-Activity, examine the key features of a class diagram. Predict whether you would be able to examine a class diagram and point out entities, associations, attributes, and operations. Determine how you would be able to tell them apart.
a class diagram in the Unified Modeling Language (UML) is a type of static structure diagram that describes the structure of a system by showing the system’s classes, their attributes, operations (or methods), and the relationships among objects.
Key Features
In the class diagram, the key features of classes are represented with boxes that contain three compartments:
- The top compartment contains the name of the class. It is printed in bold and centered, and the first letter is capitalized.
- The middle compartment contains the attributes of the class. They are left-aligned and the first letter is lowercase.
- The bottom compartment contains the operations the class can execute. They are also left-aligned and the first letter is lowercase
And yes it can be examined when it comes to class diagram and point out entities, associations, attributes, and operations because a class represents a collection of similar objects, a entities are something that a class knows or does, and a associates, attributes, and operation are another class that a class interacts with to fulfill its responsibilities. However, the only way each example could be told apart is to have examples of coding by creating a class script to explain on what duties that each attributes does.
Classmate:
Suppose you were building an object model for an online banking system. Determine which of the 14 heuristics for building models you would use to build the banking system. Provide a rationale.
The two heuristics recommended are: heuristic one and heuristic three. According to Lamsweerde (2009), driving objects from goal models (heuristic one) means defining all the conceptual objects that relate to domain properities and goals in a goal model. It ensures that an object model is complete and accurate with respects to objects referenced in the goal model. In the banking example, this allows the requirements engineer (RE) to ensure he or she is has the complete set of objects that must be incorporated into the primary requirements.
Heuristic three enables REs to define associations for objects that system agents cannot normally monitor or control. For example, if an object defined by a goal that cannot normally be resolved by a system agent, the RE can define an “image” of the object. If a situation in the banking example exists, where a goal cannot be handled by a specific object, the RE can use the “image” and one-to-one link with the actual object to ensure that attributes stay consistent and that the goal is being handled.
Blackboard is a Web-based learning management system used by Strayer for instructions, online interaction, and for educational assessment. Provide three examples of composite objects that are used in Blackboard. Explain why you believe they are composite objects.
Three examples of composite objects are: gradebook, discussion board, and video lectures. These are composite objects because they are made up of individual parts or objects (composite), which can be linked during system runtime (Lamsweerde, 2009). Gradebook object is made up of objects that input and store a letter grade, define the weights, and calculate the average final grade. The discussion board object is made up objects that store comment text, tools for editing the comment, and a submit button to submit the comment. Video lectures are objects composed other smaller objects, such as an object for encoding and decoding sound, an object to send video signals, and an object to receive video signals.
